Impact of arsenic exposure on clinicopathological characteristics of bladder cancer: A comparative study between patients from an arsenic-exposed region and nonexposed reference sites.

BACKGROUND: Beyond exposure to arsenic in drinking-water, there is few information about demographic and clinicopathological features of patients with bladder cancer living in arsenic-exposed regions. The aim of the study was to assess the impact of arsenic exposure on clinicopathological characteristics in patients with bladder cancer from a contaminated region compared to those of 2 reference areas. METHODS: Data of 285 patients with bladder cancer (83 with arsenic exposure from Antofagasta and 202 controls from 2 different sites in Santiago) were obtained through personal interviews and from review of medical records. Demographic, clinicopathological parameters, and information on relevant environmental risk factors were compared with parametric and nonparametric tests as needed. Multivariable analysis was performed to identify independent predictors for high grade and muscle-invasive disease (T2-4). RESULTS: We found no significant differences between groups regarding age at presentation (66.4 vs. 66.5 and 67.2 years; P = 0.69, for exposed vs. the 2 nonexposed groups, respectively) and female gender (28.9% vs. 29.8% and 26.2%; P = 0.84). Proportion of current smokers was significantly lower in the exposed population (10.7% vs. 38.6% and 26.9%; P < 0.001). There was a significantly higher proportion of locally advanced (10.8 vs. 1.8 and 0.7% T3/4; P = 0.002) and high-grade tumors (79.5% vs. 63.2% and 64.1%; P = 0.001) within arsenic-exposed patients. Arsenic exposure was the only significant predictor for the presence of high-grade tumors (adjusted OR: 5.10; 95%CI: 2.03-12.77) on multivariable analysis. CONCLUSIONS: Our study revealed relevant clinical differences in bladder cancer patients with a history of arsenic exposure as compared to nonexposed cases. The more aggressive phenotype associated to arsenic-related bladder cancer should be considered when designing efficient screening strategies for this high-risk population.

Manejo de epistaxis posterior en el Hospital Clínico de la Universidad de Chile entre los años 2013 y 2016 / Treatment of posterior epistaxis in the Clinical Hospital of the University of Chile between the years 2013 and 2016

Introducción: La epistaxis corresponde a una de las causas más frecuentes de consulta otorrinolaringológica en los servicios de urgencia. La epistaxis posterior es menos frecuente pero su presentación más severa. Existen varias alternativas terapéuticas, en las últimas décadas el manejo quirúrgico endoscópico de la arteria esfenopalatina (AEP) ha ido en aumento dado las ventajas en comodidad para el paciente y reducción de costos asociados. Objetivo: Revisar el manejo realizado en los cuadros de epistaxis posterior en el Hospital Clínico de la Universidad de Chile (HCUCh). Material y método: Estudio descriptivo en el Servicio de Otorrinolaringología del HCUCh de pacientes que presentaron epistaxis posterior entre el año 2013 y 2016. Resultados: Se revisó un total de 33 casos. La edad promedio de los pacientes fue 61,6 años siendo las comorbilidades más frecuentes la hipertensión arterial (36,3%) y fibrilación auricular (18,1%). Se realizó tratamiento quirúrgico en 57,6% de los pacientes siendo el clipaje de AEP la intervención quirúrgica más frecuente. Discusión y conclusiones: Tanto el manejo tradicional como las técnicas quirúrgicas presentaron eficacia similar en la serie revisada.

Introduction: Epistaxis corresponds to one of the most frequent causes of otorhinolaryngological consultation in the emergency services. Posterior epistaxis is less frequent but more severe. There are several therapeutic alternatives, in recent decades the surgical endoscopic management of the sphenopalatine artery (AEP) has been increasing given the advantages in comfort for the patient and reduction of associated costs. Aim: To review the management of posterior epistaxis in the Clinical Hospital of the University of Chile (HCUCh). Material and method: Descriptive study in the Otorhinolaryngology Service of the HCUCh of patients who presented posterior epistaxis between the years 2013 and 2016. Results: A total of 33 cases were reviewed. The mean age of the patients was 61.6 years, with the most frequent comorbidities being hypertension (36.3%) and atrial fibrillation (18.1%). Surgical treatment was performed in 57.6% of the patients, with AEP clipping being the most frequent surgical intervention. Conclusion: Both traditional management and surgical techniques presented similar efficacy in the revised series.